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  2. Operating system - Wikipedia

    en.wikipedia.org/wiki/Operating_system

    A real-time operating system (RTOS) is an operating system intended for applications with fixed deadlines ( real-time computing ). Such applications include some small embedded systems, automobile engine controllers, industrial robots, spacecraft, industrial control, and some large-scale computing systems.

  3. List of operating systems - Wikipedia

    en.wikipedia.org/wiki/List_of_operating_systems

    EOS – developed by ETA Systems for use in their ETA-10 line of supercomputers. EMBOS – developed by Elxsi for use on their mini-supercomputers. GCOS – a proprietary operating system originally developed by General Electric. MAI Basic Four – An OS implementing Business Basic from MAI Systems.

  4. Comparison of operating systems - Wikipedia

    en.wikipedia.org/.../Comparison_of_operating_systems

    In some operating systems there is OS code permanently present in a contiguous region of memory addressable by unprivileged code; in IBM systems this is typically referred to as the nucleus. The nucleus typically contains both code that requires special privileges and code that can run in an unprivileged state.

  5. Mobile operating system - Wikipedia

    en.wikipedia.org/wiki/Mobile_operating_system

    A mobile operating system is an operating system used for smartphones, tablets, smartwatches, smartglasses, or other non-laptop personal mobile computing devices.While computers such as typical/mobile laptops are "mobile", the operating systems used on them are generally not considered mobile, as they were originally designed for desktop computers that historically did not have or need ...

  6. Linux distribution - Wikipedia

    en.wikipedia.org/wiki/Linux_distribution

    A Linux distribution [a] (often abbreviated as distro) is an operating system made from a software collection that includes the Linux kernel and often a package management system. Linux users usually obtain their operating system by downloading one of the Linux distributions, which are available for a wide variety of systems ranging from ...

  7. Linux - Wikipedia

    en.wikipedia.org/wiki/Linux

    A Linux-based system is a modular Unix-like operating system, deriving much of its basic design from principles established in Unix during the 1970s and 1980s. Such a system uses a monolithic kernel, the Linux kernel, which handles process control, networking, access to the peripherals, and file systems.

  8. Comparison of user features of operating systems - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_user...

    An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs.. Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time, mass storage, printing, and other resources.

  9. Mac operating systems - Wikipedia

    en.wikipedia.org/wiki/Mac_operating_systems

    The current Mac operating system is macOS, originally named "Mac OS X" until 2012 and then "OS X" until 2016. [3] It was developed between 1997 and 2001 after Apple's purchase of NeXT. It brought an entirely new architecture based on NeXTSTEP, a Unix system, that eliminated many of the technical challenges that the classic Mac OS faced, such as ...